net: wwan: iosm: devlink registration

Register with devlink framework and implment callbacks required
for fw flashing and coredump collection.

Signed-off-by: M Chetan Kumar <m.chetan.kumar@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 207 insertions, 0 deletions

diff --git a/drivers/net/wwan/iosm/iosm_ipc_devlink.h b/drivers/net/wwan/iosm/iosm_ipc_devlink.h
new file mode 100644
index 000000000000..392735080cb3
--- /dev/null
+++ b/drivers/net/wwan/iosm/iosm_ipc_devlink.h
@@ -0,0 +1,207 @@
+/* SPDX-License-Identifier: GPL-2.0-only
+ *
+ * Copyright (C) 2020-2021 Intel Corporation.
+ */
+
+#ifndef _IOSM_IPC_DEVLINK_H_
+#define _IOSM_IPC_DEVLINK_H_
+
+#include <net/devlink.h>
+
+#include "iosm_ipc_imem.h"
+#include "iosm_ipc_imem_ops.h"
+#include "iosm_ipc_pcie.h"
+
+/* MAX file name length */
+#define IOSM_MAX_FILENAME_LEN 32
+/* EBL response size */
+#define IOSM_EBL_RSP_SIZE 76
+/* MAX number of regions supported */
+#define IOSM_NOF_CD_REGION 6
+/* MAX number of SNAPSHOTS supported */
+#define MAX_SNAPSHOTS 1
+/* Default Coredump file size */
+#define REPORT_JSON_SIZE 0x800
+#define COREDUMP_FCD_SIZE 0x10E00000
+#define CDD_LOG_SIZE 0x30000
+#define EEPROM_BIN_SIZE 0x10000
+#define BOOTCORE_TRC_BIN_SIZE 0x8000
+#define BOOTCORE_PREV_TRC_BIN_SIZE 0x20000
+
+/**
+ * enum iosm_devlink_param_id - Enum type to different devlink params
+ * @IOSM_DEVLINK_PARAM_ID_BASE:			Devlink param base ID
+ * @IOSM_DEVLINK_PARAM_ID_ERASE_FULL_FLASH:     Set if full erase required
+ * @IOSM_DEVLINK_PARAM_ID_DOWNLOAD_REGION:	Set if fls file to be
+ *						flashed is Loadmap/region file
+ * @IOSM_DEVLINK_PARAM_ID_ADDRESS:		Address of the region to be
+ *						flashed
+ * @IOSM_DEVLINK_PARAM_ID_REGION_COUNT:		Max region count
+ */
+
+enum iosm_devlink_param_id {
+	IOSM_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
+	IOSM_DEVLINK_PARAM_ID_ERASE_FULL_FLASH,
+	IOSM_DEVLINK_PARAM_ID_DOWNLOAD_REGION,
+	IOSM_DEVLINK_PARAM_ID_ADDRESS,
+	IOSM_DEVLINK_PARAM_ID_REGION_COUNT,
+};
+
+/**
+ * enum iosm_rpsi_cmd_code - Enum type for RPSI command list
+ * @rpsi_cmd_code_ebl:		Command to load ebl
+ * @rpsi_cmd_coredump_start:    Command to get list of files and
+ *				file size info from PSI
+ * @rpsi_cmd_coredump_get:      Command to get the coredump data
+ * @rpsi_cmd_coredump_end:      Command to stop receiving the coredump
+ */
+enum iosm_rpsi_cmd_code {
+	rpsi_cmd_code_ebl = 0x02,
+	rpsi_cmd_coredump_start = 0x10,
+	rpsi_cmd_coredump_get   = 0x11,
+	rpsi_cmd_coredump_end   = 0x12,
+};
+
+/**
+ * enum iosm_flash_comp_type - Enum for different flash component types
+ * @FLASH_COMP_TYPE_PSI:	PSI flash comp type
+ * @FLASH_COMP_TYPE_EBL:	EBL flash comp type
+ * @FLASH_COMP_TYPE_FLS:	FLS flash comp type
+ * @FLASH_COMP_TYPE_INVAL:	Invalid flash comp type
+ */
+enum iosm_flash_comp_type {
+	FLASH_COMP_TYPE_PSI,
+	FLASH_COMP_TYPE_EBL,
+	FLASH_COMP_TYPE_FLS,
+	FLASH_COMP_TYPE_INVAL,
+};
+
+/**
+ * struct iosm_devlink_sio - SIO instance
+ * @rx_list:	Downlink skbuf list received from CP
+ * @read_sem:	Needed for the blocking read or downlink transfer
+ * @channel_id: Reserved channel id for flashing/CD collection to RAM
+ * @channel:	Channel instance for flashing and coredump
+ * @devlink_read_pend: Check if read is pending
+ */
+struct iosm_devlink_sio {
+	struct sk_buff_head rx_list;
+	struct completion read_sem;
+	int channel_id;
+	struct ipc_mem_channel *channel;
+	u32 devlink_read_pend;
+};
+
+/**
+ * struct iosm_flash_params - List of flash params required for flashing
+ * @address:		Address of the region file to be flashed
+ * @region_count:	Maximum no of regions for each fls file
+ * @download_region:	To be set if region is being flashed
+ * @erase_full_flash:   To set the flashing mode
+ *                      erase_full_flash = 1; full erase
+ *                      erase_full_flash = 0; no erase
+ * @erase_full_flash_done: Flag to check if it is a full erase
+ */
+struct iosm_flash_params {
+	u32 address;
+	u8 region_count;
+	u8 download_region;
+	u8 erase_full_flash;
+	u8 erase_full_flash_done;
+};
+
+/**
+ * struct iosm_ebl_ctx_data -  EBL ctx data used during flashing
+ * @ebl_sw_info_version: SWID version info obtained from EBL
+ * @m_ebl_resp:         Buffer used to read and write the ebl data
+ */
+struct iosm_ebl_ctx_data {
+	u8 ebl_sw_info_version;
+	u8 m_ebl_resp[IOSM_EBL_RSP_SIZE];
+};
+
+/**
+ * struct iosm_coredump_file_info -  Coredump file info
+ * @filename:		Name of coredump file
+ * @default_size:	Default size of coredump file
+ * @actual_size:	Actual size of coredump file
+ * @entry:		Index of the coredump file
+ */
+struct iosm_coredump_file_info {
+	char filename[IOSM_MAX_FILENAME_LEN];
+	u32 default_size;
+	u32 actual_size;
+	u32 entry;
+};
+
+/**
+ * struct iosm_devlink - IOSM Devlink structure
+ * @devlink_sio:        SIO instance for read/write functionality
+ * @pcie:               Pointer to PCIe component
+ * @dev:                Pointer to device struct
+ * @devlink_ctx:	Pointer to devlink context
+ * @param:		Params required for flashing
+ * @ebl_ctx:		Data to be read and written to Modem
+ * @cd_file_info:	coredump file info
+ * @iosm_devlink_mdm_coredump:	region ops for coredump collection
+ * @cd_regions:		coredump regions
+ */
+struct iosm_devlink {
+	struct iosm_devlink_sio devlink_sio;
+	struct iosm_pcie *pcie;
+	struct device *dev;
+	struct devlink *devlink_ctx;
+	struct iosm_flash_params param;
+	struct iosm_ebl_ctx_data ebl_ctx;
+	struct iosm_coredump_file_info *cd_file_info;
+	struct devlink_region_ops iosm_devlink_mdm_coredump[IOSM_NOF_CD_REGION];
+	struct devlink_region *cd_regions[IOSM_NOF_CD_REGION];
+};
+
+/**
+ * union iosm_rpsi_param_u - RPSI cmd param for CRC calculation
+ * @word:	Words member used in CRC calculation
+ * @dword:	Actual data
+ */
+union iosm_rpsi_param_u {
+	__le16 word[2];
+	__le32 dword;
+};
+
+/**
+ * struct iosm_rpsi_cmd - Structure for RPSI Command
+ * @param:      Used to calculate CRC
+ * @cmd:        Stores the RPSI command
+ * @crc:        Stores the CRC value
+ */
+struct iosm_rpsi_cmd {
+	union iosm_rpsi_param_u param;
+	__le16	cmd;
+	__le16	crc;
+};
+
+/**
+ * ipc_devlink_init - To initialize the devlink to IOSM driver
+ * @ipc_imem:	Pointer to struct iosm_imem
+ *
+ * Returns:	Pointer to iosm_devlink on success and NULL on failure
+ */
+struct iosm_devlink *ipc_devlink_init(struct iosm_imem *ipc_imem);
+
+/**
+ * ipc_devlink_deinit - To unintialize the devlink from IOSM driver.
+ * @ipc_devlink:	Devlink instance
+ */
+void ipc_devlink_deinit(struct iosm_devlink *ipc_devlink);
+
+/**
+ * ipc_devlink_send_cmd - Send command to Modem
+ * @ipc_devlink: Pointer to struct iosm_devlink
+ * @cmd:	 Command to be sent to modem
+ * @entry:	 Command entry number
+ *
+ * Returns:	 0 on success and failure value on error
+ */
+int ipc_devlink_send_cmd(struct iosm_devlink *ipc_devlink, u16 cmd, u32 entry);
+
+#endif /* _IOSM_IPC_DEVLINK_H */